213

Oral Presentations

Proceedings of the 21st IPVS Congress, Vancouver, Canada – July 18-21, 2010

O.179

Anaemia in the hyperprolifi c sow: Eff ect of injectable iron administration and relation with fattening score

Vincent Auvigne1 Hugues Perrin2 Arlette Laval2 Bénédicte Bertucat3 Valérie Normand4

1. Ekipaj, Pozuelo de Alarcón, Spain; 2. ENVN, Nantes, France; 3. Ceva Santé Animale , Libourne, France; 4. Porc.Spective, Pontivy, France

Introduction

Although anaemia in sows is less studied than in piglets, it can be supposed that it is a key factor of the sow’s health status. The aim of this study is to describe levels of anaemia observed in hyperprolyfi c farms in France and to study the eff ect of inject-able iron (GLEPTOSIL®) administration during gestation.

Materials and Methods

The study was carried out in 2009 in seven hyperprolyfi c farms (13.8 to 15.6 born piglets/sow/year) with a high percentage of stillborn (> 8%) and/or manual assistance at farrowing (> 15%). Sows (n=510) were individually randomised into two groups (Gleptoferron and Control), 7 weeks prior to farrowing after stratifi cation according to parity and the initial haemoglobin level. Sows from the Gleptoferron group received two injections of GLEPTOSIL® at 7 and 4 weeks before farrowing (10 ml per injection, i.e. a total of 4 g of gleptoferron).

The level of anaemia was assessed by haemoglobinaemia, measured with the Hemocue® Hb 201+ device. (1). Kinetics was observed by measuring the levels at four stages of the repro-ductive cycle of each sow: seven and four weeks before farrow-ing, after farrowing (between 48h and 5 days) and on day 20 of lactation. Two measures of the backfat layer thickness (BFL) were carried out on each sow (four weeks before farrowing and at farrowing). Lme procedures (R 2.9.0) were used. Parity ranking and haemoglobin level at the start of the study were set as fi xed eff ects, farm and batch as random eff ects.

Results

Haemoglobinaemia is linked to the parity rank and decreases all along the career of the sows. The average BFL decreases from the fourth litter onwards. Sows with high haemoglobinaemia levels are fatter (Figure 1). This relation is signifi cant, even after adjustment for the parity (p=0.02). A positive eff ect of the gleptoferron injection is observed 3 weeks after the fi rst injec-tion. However, there is an interaction between “Treatment” and “Parity” (Table 1).

Figure 1: Haemoglobin and BFL 4 weeks before farrowing

Table 1 – Treatment eff ect on haemoglobinaemia (g/L) 4 weeks before farrowing

Discussion

The drop in haemoglobinaemia with an increasing parity rank was not reported in a similar study carried out 30 years ago (2). This newly discovered relation might be due to the dra-matic increase in prolifi cacy over the past decades. The relation between haemoglobinaemia and BFL is signifi cant even after adjustment for the rank of parity, what strengthens its biological signifi cance. Though, the study does not allow establishing a causal link we favour the hypothesis of an insuffi cient nutritional intake for both the build-up of body reserves and for restoring the haemoglobinaemia. The injection of gleptoferron allows partial compensation of the anaemia. This partial effi cacy of gleptoferron could be explained by an insuffi cient quantity of iron injected.

References1. von Schenck, H. et al. Clin Chem (1986).32, 526-5292. Meissonier, E. et al. Journées Rech. Porcine (1980).31, 317-326

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